HENDERSONIA. 475 



Hendersonia foliicola (J')erk.) (Britain and Europe). The 

 black globular pjcnitlia are produced superficially on leaves of 

 Juniijcrus commun is. The conidia are elliptical in shape, three- to 

 five-celled, and abjointed from filamentous conidiophores. (This 

 species is not identical with Podiosoma Juniperi ^ minor Corda, 

 which is more like the needle-frequenting form of Gymno- 

 sporangium juniper inmn.y 



Sevei-cal species are fomid on living leaves : 

 H. cydoniae C. et Ell. on qiiince in America. 

 H. mail Thiini, on apple. 



H. rhododendri Thliin, on Rhododendron hirsutum in Northern Italy and 

 Germany. 



Cryptostictis. 



Similar to Hendersonia, but having ciliate spores. 

 Cr. cynosbati (Fuck.). Sorauer - regards this as parasitic 

 on Rosa canina, and causing death of portions of the rind. 



Stagonospora, Couturea, Asteromidium, and Camarosporium contain 

 species said to frequent living leaves of various plants. 



SCOLECOSPORAE. 



Septoria. 



Spores generally multicellular and hyaline ; produced from 

 short conidiophores, contained in lens-shaped embedded pycnidia. 



Septoria parasitica Hartig.^ This disease may be frequently 

 observed in young plantations and seed-beds of Spruce. The 

 symptoms are very like those following damage by frost, brown 

 needles appearing in May towards the base or middle parts of 

 young shoots, and followed by a premature needle-cast. The 

 disease is most apparent on lateral shoots, which become sharply 

 bent downwards, the green needles hanging limply till they 

 wither and fall as the whole shoot shrivels up. 



The pycnidia are little, black, and spherical ; they are pro- 

 duced during the sunmier, particularly towards the lower end 



^ K. v. Tubeuf, " Generations-weclisel Oymnosporangium-Arten," Ccii'ra/f/f. f. 

 Bakteriologie v. Parasiteukunde, 1891. 



"^Handbuchd. Pflanzenkrankheiten, ii., 1876, p. 388. 



^R. Hartig, Ze.itsch. f. Forst. u. JcKjd-treseii, 1890; and Forgllich-uadirwiss. 

 Zeitschrift, 1893. 



